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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 267 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.Tara has a ribbon 3/5 m long and cuts off 1/10 m. How long is the ribbon now (in m)? =
  2. 2.3/5 − 1/4 =
  3. 3.9/10 − 1/6 =
  4. 4.A tank is 1/4 full of water. Then water filling 1/10 of the tank is used. What fraction of the tank is full now? =
  5. 5.A bottle has 5/6 litre of juice. Sara drinks 2/5 litre. How much juice is left (in litres)? =
  6. 6.2/3 − 3/7 =
  7. 7.A bottle has 4/9 litre of juice. Sara drinks 1/3 litre. How much juice is left (in litres)? =
  8. 8.2/3 − 5/9 =
  9. 9.Tara has a ribbon 7/8 m long and cuts off 3/4 m. How long is the ribbon now (in m)? =
  10. 10.9/10 − 1/3 =
  11. 11.A tank is 9/10 full of water. Then water filling 5/6 of the tank is used. What fraction of the tank is full now? =
  12. 12.A tank is 1/4 full of water. Then water filling 1/8 of the tank is used. What fraction of the tank is full now? =
  13. 13.1/2 − 1/5 =
  14. 14.A bottle has 9/10 litre of juice. Rohan drinks 2/5 litre. How much juice is left (in litres)? =
  15. 15.3/4 − 2/5 =
  16. 16.2/5 − 1/4 =
  17. 17.Diya has a ribbon 7/9 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =
  18. 18.3/4 − 1/7 =
  19. 19.A bottle has 5/7 litre of juice. Meera drinks 2/3 litre. How much juice is left (in litres)? =
  20. 20.4/5 − 7/10 =
  21. 21.A tank is 3/5 full of water. Then water filling 1/2 of the tank is used. What fraction of the tank is full now? =
  22. 22.A bottle has 5/6 litre of juice. Meera drinks 1/9 litre. How much juice is left (in litres)? =
  23. 23.A bottle has 1/3 litre of juice. Tara drinks 1/10 litre. How much juice is left (in litres)? =
  24. 24.1/2 − 2/7 =
  25. 25.Sara has a ribbon 5/6 m long and cuts off 4/5 m. How long is the ribbon now (in m)? =
  26. 26.1/3 − 2/9 =
  27. 27.1/2 − 1/8 =
  28. 28.5/9 − 1/2 =
  29. 29.6/7 − 1/2 =
  30. 30.A bottle has 7/8 litre of juice. Aarav drinks 2/3 litre. How much juice is left (in litres)? =
  31. 31.2/3 − 1/9 =
  32. 32.5/6 − 4/5 =
  33. 33.1/2 − 1/7 =
  34. 34.A tank is 3/4 full of water. Then water filling 2/7 of the tank is used. What fraction of the tank is full now? =
  35. 35.A tank is 3/4 full of water. Then water filling 3/10 of the tank is used. What fraction of the tank is full now? =
  36. 36.A tank is 3/4 full of water. Then water filling 3/7 of the tank is used. What fraction of the tank is full now? =
  37. 37.4/7 − 1/4 =
  38. 38.5/9 − 1/6 =
  39. 39.A bottle has 6/7 litre of juice. Riya drinks 1/2 litre. How much juice is left (in litres)? =
  40. 40.Riya has a ribbon 5/7 m long and cuts off 2/3 m. How long is the ribbon now (in m)? =

Answer key

  1. 1/2
  2. 7/20
  3. 11/15
  4. 3/20
  5. 13/30
  6. 5/21
  7. 1/9
  8. 1/9
  9. 1/8
  10. 17/30
  11. 1/15
  12. 1/8
  13. 3/10
  14. 1/2
  15. 7/20
  16. 3/20
  17. 1/9
  18. 17/28
  19. 1/21
  20. 1/10
  21. 1/10
  22. 13/18
  23. 7/30
  24. 3/14
  25. 1/30
  26. 1/9
  27. 3/8
  28. 1/18
  29. 5/14
  30. 5/24
  31. 5/9
  32. 1/30
  33. 5/14
  34. 13/28
  35. 9/20
  36. 9/28
  37. 9/28
  38. 7/18
  39. 5/14
  40. 1/21

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